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Business Segments (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Net interest income $ 5,331 $ 4,838  
Provision for loan losses 22 100 $ 993
Net interest income after provision for loan losses 5,309 4,738  
Noninterest income 1,186 861  
Noninterest expenses 5,097 4,497  
Income before income taxes 1,398 1,102  
Income tax expense 275 342  
Net Income 1,123 760  
Total assets 653,635 578,433 $ 626,341
Community Banking [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net interest income 5,331 4,838  
Provision for loan losses 22 100  
Net interest income after provision for loan losses 5,309 4,738  
Noninterest income 566 490  
Noninterest expenses 4,604 4,128  
Income before income taxes 1,271 1,100  
Income tax expense 248 341  
Net Income 1,023 759  
Total assets 650,068 576,675  
Mortgage [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Noninterest income 620 371  
Noninterest expenses 493 369  
Income before income taxes 127 2  
Income tax expense 27 1  
Net Income 100 1  
Total assets $ 3,567 $ 1,758